Yarn advancing reel



July 3 1951 w. G. EsMoND 2,558,836

' YARN ADVANCING REEL I v Filed Feb. 5, 1947 2 /6 49 J /l/ l, l I

v a I 9 n INVENTOR.

WILLIAM G- ESMOND BY //ATTIOR: Nf-:Ysj`

Patented July 3, 1951 YARN ADVANCING REEL William G. Esmond, Cumberland, Md., assignor to Celanese Corporation of America, aI corporation of Delaware Application February 5, 1947, Serial No. 726,517

(Cl. 28-7L7) 2 Claims.

rlhis invention relates to apparatus employed in the manufacture of articial silk filaments, thread, yarn and the like, hereinafter referred to as yarn, and relates more particularly to a yarn reel adapted to advance helices of yarn in an axial direction. The yarn may be subjected to a treatment with a fluid medium or mediums during the movement of the helices of yarn along the reel.

An object of this invention is the provision oi an improved yarn advancing reel of the cantilever type characterized by its simplicity and strength of construction.

Another object of this invention is to provide an improved yarn advancing reel embodying a plurality of bars which are angularly spaced with respect to each other, the angular spacing' being fixed and equal, and which bars are divided into two sets or cages adapted for interdigitating movement.

A further object of this invention is to provide an improved yarn advancing reel in which tht` movement of the cages with respect to each other may be synchronized in advance before the transfer of yarn is made to avoid abrasion and in which the cages advance the yarn uniformly.

Other objects of this invention, together with certain details of construction and combinations of parts, will appear from the followingdetailed description.

In the drawings wherein a preferred embodiment of this invention is shown,

Fig. l is an elevational view of the free end of the yarn advancing reel of this invention,

Fig. 2 is a side elevational view, partly in sec tion, of the advancing reel, and

Fig. 3 is a cross-sectional view taken on lines 3-3 in Fig. 2. y

Like reference numerals indicate like parts throughout the several views of the drawings.

Referring to the drawings for a detailed description of my invention, the reel comprises a plurality of bars which are divided into equal sets to form two cages. rlhe bars generally indicated by reference numeral 4 form one cage, and the bars generally indicated by reference numeral 5 form the other cage. The bars 4 and 5 are supported, by means hereinafter set forth, on a single shaft 5 driven by any suitable means (not shown), which shaft rotates said bars. The shaft is rotatably mounted in a bushing 1 and held therein by means of thrust bearings 3 and 9 and collar il. The bushing l and thus, the reel structure is supported by means of bolts l2 on a flange i3 which is attached to a rigid supporting structure (not shown).

lThe bars ll and 5 are substantially similar in structure and comprise a slider l 4 made of tubing substantially square in cross-section and, telescopically arranged within said slider, an inner bar l5 also made of tubing, which is square in cross-section. The slider irl is spaced from inner bar l5 by means of ball bearings i5 carried in ball-race grooves il.

The inner bars l5 are supported on shafts i8 passing through cylindrical guide openings it arranged in guide housing 2l carried on a disc 22 mounted for rotation on shaft 6. There are sixteen of such guide housings on disc 22, one for each bar of the reel structure. if desired, anti-friction means may be provided in the cylindricel guide ope ings I. The shafts ES are mounted on a platform bracket 23 having a lug 25, in which is rotatably carried a cam follower 25. The cam followers which are attached to the platform brackets on which bars are supported are indicated -by reference numeral 25. The means for giving the bars 1i and 5 the re quired in and out interdigitating movement comprises stationary cain-s 271 and 22 integral with or fixed to bearings l, cam followers 25 of bars l being adapted to run on the circumferential surface of cam 2i .and cam followers 26 of bars ii being adapted to run on the circumferential surn face of cam Z6. The cani followers $5 and 25 are held in contact with the cam surfaces by means such as spring 2Q, one end of which is attached to the underside of inner bar E5 and the other end is carried in a well 3i arranged in guide housing 2i. On rotation of shaft S, the disc 22 is rotated, carrying with it bars i and 5 of the reel. The earn followers 25 and 2t ride on the circumferential surfaces of stationary cams 2l* and 28 respectively and impart the proper interdigitating movement to the bars E. and 5. Referring to Figure l, it will be seen that one cage or set of bars, for example bars il, follows a circular path for of rotation and then withdraws uniformly towards the center of the reel, the extent of withdrawal being as a rule about a. The cage comprising bars 5 moves exactly as the cage coinprising bars l but 189 out of phase. It is to be understood that the motion of bars i and 5 may be altered by changing the contour of thc cir cumferential surfaces of cams 2l' and 28.

The sliders lil of bars Il are caused to yadvance uniformly by the following means: Each of the sliders of bars l is provided with a stub shaf 32 on which a cam follower 33 is rotatably mounted for contact with the edge 43ft of cani 35 fixed to bushing l. The edge m of the cam 35 is so cut as to give a uniform advance to the sliders through from 180 to 300 of rotation of the bars about shaft 6. However, the movement of the sliders is preferably such that they advance from 225 to 275 of rotation and return through the 3 other 135 to 85 of rotation. The cam follower 33 is held against the edge 34 of the cam 35 by means of compression spring 36 carried in the opening of inner bar I5, the spring being retained in position between a lug 31 on the slider I4 and the upturned end 38 of the inner bar l5. The sliders of bars 5 are caused to advance and return uniformly in a similar manner. Thus, each of the sliders of bars 5 is provided with a stub shaft 39 having rotatably mounted thereon a, cam follower 4I adapted to contact edge 42 of cam 43 which is also fixed to bearing l. The edge 42 of cam 43, like the edges 34 of cam 35, is cut so as to impart a uniform advance to the sliders of bars 5 throughout 225 to 275 of rotation of the reel about shaft 6 and the return of the sliders through the other 135 to 85 of rotation.

In order to seal the elements for moving bars 4 and 5, there is provided a cylindrical drum 44 rotatable with said bars on a ball-race 45 supported on bearing '1. The drum is sealed by suitable means, such as a molded rubber gasket 45 having openings 45 through which the bars are adapted to pass, attached to disc 22, through collar 41 attached to or integral with the latter, by means of washer 48 and a screw 49. Telescop-ing flanges 5l and 52 may also be provided an additional sealing means.

The motion of the advancing reel of this invention will now be explained with particular reference to Fig. 1. As the shaft rotates, the cam follower 25 rides on the circumferential surface of cam 2 and causes the bars 4 of one cage to folloW a perfectly circular path clockwise from point E to point F, and then to move gradually and uniformly inward towards shaft 5 from point F to point G, the maximum Withdrawal point, and then to move outwardly from point G to point E where they are fully extended. At the same time, the rotation of shaft 6 causes cam followers 28 to ride on the circumferential surface of cam 28 thereby causing the bars 5 of the second cage to follow a perfectly circular path clockwise from point F to point E, then to Withdraw gradually and uniformly inward toward shaft 6 from point E to point H, the point of maximum withdrawal, and then gradually to move outwardly from point H to point F where they are fully extended.V

The movement of the cages with respect to each other is synchronized in advance vbefore the transfer of the yarn is made so as to eliminate substantially any abrasion of the yarn. Thus, the sliders of bars 4 of one cage begin advancing, i. e. moving towards the left as viewed in Fig. 2 at point I before the bars are fully extended and the advancing continues until point J is reached. From point J to point I, the sliders return to their original positions ready for another advancing movement. This return of the slider is made while bars 4 are withdrawn away from the yarn. This motion of the sliders is effected by cam followers 33 running on the edge 34 of cam 35 cage begin advancing at point K before the bars 5 are fully extended and before the advance of the sliders of bars 4 of the other cage has stopped (at point J). A uniform advance of the sliders of bars 5 of the second cage continues around to point L. Since the bars 5 Withdraw from point E to point L, the advance of the sliders continues until the bars have moved inwardly and away from the yarn. From point L to point K, the sliders of bars 5 return to their original position ready for another advance. The motion of The sliders of bars 5 of the otherA 4 the sliders of bars 5 is effected by cam followers 4I running on the edge 42 of cam 43.

The structure of the advancing reel of the present invention possesses many advantages. Thus the ball bearing and shaft arrangement permits of the in and out movement of the bars of the cages to be parallel at all times to shaft 6; the angular spacing of the bars remains xed and equal, avoiding any abrasion of the yarn; the cam means in effecting the interdigitating movement of the cages is positive; both cages may be synchronized in advance before the transfer of yarn is made and both cages advance uniformly thus producing perfect helices of yarn.

It is to be understood that the foregoing detailed description is given merely by way of illustration and that many variations may be made therein without departing from the spirit of my invention.

Having described my invention, what I desire to secure by Letters Patent is:

1. In a reel for advancing helices of yarn axially, having a rotatable shaft, a plurality of axially extending bars for carrying the yarn along the reel rotatable by said shaft, means for reciprocating said bars and a drum, having an opening through which said bars extend and an opening through which said shaft extends, angularly movable with said bars for housing said bar reciprocating means, the improvement which comprises means for sealing said drum against the entrance of fluids, said means including a rubber gasket attached to and movable with said drum for substantially closing said first-mentioned opening in said drum, said rubber gasket having openings therein through which said bars protrude, and telescoping flanges for sealing said second-mentioned opening.

2. In a reel for advancing helices of yarn axially, said reel having a rotatable shaft, a plurality of axially extending bars for carrying the yarn along the reel rotatable by said shaft, means for reciprocating said bars, and a drum for housing said reciprocating means, said drum being angularly movable with said bars, and completely open at one end to provide an opening through which said bars extend, the improvement which comprises a rubber web-like gasket attached to the outer circumference 0f said drum and movable with said drum for substantially completely closing said opening in said drum against the entrance of fluids, said rubber gasket having openings therein through which said bars protrude.

WILLIAM G. ESMOND.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS- Number Name Date 2,023,477 Knebusch et al Dec. 10, 1935 2,181,916 Samerdyke Dec. 5, 1939 2,255,017 Terrence et al Sept. 2, 1941 2,384,963 Pollak Sept. 18, 1945 2,378,211 Furness June 12, 1945 2,387,252 Furness Oct. 23, 1945 2,414,644 Gram Jan. 21, 1947 2,415,115 Stanley Feb. 4, 1947 2,424,490 Henry July 22, 1947 2,446,525 Castellan Aug. 10, 1948 FOREIGN PATENTS Number Country Date 706,195 Germany May 20, 1941 

